Hand Spay wand not working at Kitchen Sink any ideas how to fix

I have 2011 2552 and my hand spray wand at the kitchen sink will only produce a very very slow trickle when pushing in the thump trigger. I took apart the sprayer and flushed and cleaned it and saw no or felt no obstructions from hard water cal. build up. When I push the trigger with a good water flow coming out of the facet the water stops and the slow trickle comes out of the hand sprayer. I turn off the facet and back on to get the normal flow of water out of the facet.I am thinking there is something causing a near blockage near the point of attachment of the sprayer hose. The sprayer hose is clear and easy to see any obstruction so I do not think its the hose. How does one get to the point of attachment as it is behind the sink I took a picture of where I think the blockage may be occurring.. your thoughts? 

It is my life experience that those separate sink spray hoses just give up for no clear reason.  My 2013 2100 was giving up so I just replaced it with the following:
https://www.amazon.com/gp/product/B00TPUN81Y/ref=ppx_yo_dt_b_asin_title_o04_s00?ie=UTF8&psc=1

Way less brain damage than trying to figure out why the spray will not work and you get a nice new faucet in the bargan.

It is my life experience that those separate sink spray hoses just give up for no clear reason.  My 2013 2100 was giving up so I just replaced it with the following:
https://www.amazon.com/gp/product/B00TPUN81Y/ref=ppx_yo_dt_b_asin_title_o04_s00?ie=UTF8&psc=1

Way less brain damage than trying to figure out why the spray will not work and you get a nice new faucet in the bargan.

We had the same problem plus occasionally no water came out of the faucet OR hand sprayer. No replacement parts are available.  By chance I replaced it with the same faucet as above, works so much better that the original, looks better too.

How were you able to get in to remove old faucet?

I paid an excellent RV shop in Denver. They have all the specialty tools (like extra long wrenches) and know how and  I'm getting too old to contort my body into those small places. It took them 30 minutes longer than quoted because as stated on the invoice, "...due to the difficulty of the tight space."

How were you able to get in to remove old faucet?

Not too tough, helps to be a skinny armed contortionist that isn't afraid to do plumbing! Assuming things are the same as in my 2010 2551, all fittings are finger tightened. Pulling out the silverware drawer helped some. Removing the P-trap can help see what is going on. Again, hand tightened.

Thanks I will give it a try.
Syd

In your photo one of the hand tightened knurled supply line fittings shows. The other showing stays attached to the fixture as it is the sprayer line. The fixture itself has large wing-nuts holding it to the deck.

ok, thanks for the input. I will take it under advisement and see how it goes

I have 2011 2552 and my hand spray wand at the kitchen sink will only produce a very very slow trickle when pushing in the thump trigger. I took apart the sprayer and flushed and cleaned it and saw no or felt no obstructions from hard water cal. build up. When I push the trigger with a good water flow coming out of the facet the water stops and the slow trickle comes out of the hand sprayer. I turn off the facet and back on to get the normal flow of water out of the facet.I am thinking there is something causing a near blockage near the point of attachment of the sprayer hose. The sprayer hose is clear and easy to see any obstruction so I do not think its the hose. How does one get to the point of attachment as it is behind the sink I took a picture of where I think the blockage may be occurring.. your thoughts? 

I had a similar problem, took out the 3 drawers under the counter top and found the hose kinked where the weight is on it.   I moved the weight so it no longer kinked the hose and problem solved.